Παραπομπή APA

Crole, R. L. (1993). Categgories for types. Cambridge University Press.

Παραπομπή Chicago Style

Crole, Roy L. Categgories for Types. Cambridge: Cambridge University Press, 1993.

Παραπομπή MLA

Crole, Roy L. Categgories for Types. Cambridge University Press, 1993.